Tube



FIG. 1 is a top front left perspective view of a tube in accordance with my design;

FIG. 2 is a front right perspective view of a tube in accordance with my new design;

FIG. 3 is a bottom front right perspective view of a tube in accordance with my new design;

FIG. 4 is a top left perspective view of an assemblage of six tubes in accordance with FIG. 1; and,

FIG. 5 is a top plan view of a resilient support formed from a multiplicity of tubes in accordance with FIG. 1.

The broken lines in the drawings depict environmental subject matter only and form no part of the claimed design. 

We claim the ornamental design for a tube, as shown and described. 